Help with image sizing

Bear with me, I'm a beginner.

I'm creating a banner for my webpage that involves video game sprites, and I found the appropriate ones I needed on another site, but I need them enlarged. What kind of free program can I download to make them larger without getting stretched and losing detail?

 

no matter what you use you if you stretch an image it will always lose its detail because when you make an image it has a certain resolution. When you enlarge it or stretch it the resolution stays the same but becomes larger.

 

BlackCat, I haven't used this gif online image editor site yet, but others have recommended it for manipulating the size of gifs (maybe they're just going smaller in size, I don't know, but it's worth a look).

http://www.gifworks.com/cgi-bin/gifworks.pl?com=transfer_open

 

neonemesis is correct

if you enlarge an image you will loose the quality and it will begin to show the actual pixels.

I do not think there is any program outhere that can do what you want even the best programs like photoshop cannot do it.

 

Thanks Blockhead, just what I was looking for.